Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d3b339c62a8366…

MALICIOUS

PDF

78.1 KB Created: 2021-03-15 18:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 26be73a39084878a3f5104659d0135a1 SHA-1: 745f1d5c8d556e1a6fec500ef3ce4471f0cc19bb SHA-256: d7d3b339c62a83667d369d94f3d951637054e6f6cbe88cc67e9bea182e5f6919
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URL that redirects to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/strik?utm_term=mercer+cost+of+living+ranking+2020 PDF link annotation
    • https://cdn.sqhk.co/gebitasixa/SMggchh/lemepivan.pdfIn PDF document text
    • http://divalurumewib.iblogger.org/61148481317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_604daa85ac392.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/IJhfRhj/43806597338.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/alternative_dispute_resolution_act.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459025/normal_6028b31e7a8c3.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/eMcibia/gedobom.pdfIn PDF document text
    • http://jewidexomemivib.iblogger.org/bojapibemisurazurugu.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/IK5hhie/free_online_antivirus_scanner_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/zajagatetode/hgdgcVx/18398488278.pdfIn PDF document text
    • http://nisiwitas.22web.org/78293145134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475571/normal_601f8ed089388.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jufowokedunod/7531428174.pdfIn PDF document text
    • http://jezuwujitek.epizy.com/kixoxikomefifugudinigud.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/13478321353.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/rupabimubaloravuzugokaw.pdfIn PDF document text
    • http://lukafimagog.atwebpages.com/nubuna.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FF 5240 bytes
SHA-256: 0a46d1fde3cd0fc4bd1fde55001b3893ba93ad7e6cd9cbc4083764b5fc5416ae
font_01_sfnt_off0000f8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EA 10792 bytes
SHA-256: 9f3b07845431061602728e5294bfaac959be650235f1a7681b7c31d0caabeea3
font_02_sfnt_off00011d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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